3) ...Why???
My reasoning is that on public servers, when the overmind dies/base is dying, you have a ton of noobs spawning as dretches and clogging up the spawn queue, basically a hovel egg would make sure at least one granger can spawn and rebuild.
Anyways, these are just a number of suggestions that can be used to make the hovel into a useful building, I would only recommend selecting one of them for implementation though.